// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/message_loop/message_loop_task_runner.h"

#include "base/location.h"
#include "base/logging.h"
#include "base/message_loop/incoming_task_queue.h"

namespace base {
namespace internal {

    MessageLoopTaskRunner::MessageLoopTaskRunner(
        scoped_refptr<IncomingTaskQueue> incoming_queue)
        : incoming_queue_(incoming_queue)
        , valid_thread_id_(kInvalidThreadId)
    {
    }

    void MessageLoopTaskRunner::BindToCurrentThread()
    {
        AutoLock lock(valid_thread_id_lock_);
        DCHECK_EQ(kInvalidThreadId, valid_thread_id_);
        valid_thread_id_ = PlatformThread::CurrentId();
    }

    bool MessageLoopTaskRunner::PostDelayedTask(
        const tracked_objects::Location& from_here,
        const base::Closure& task,
        base::TimeDelta delay)
    {
        DCHECK(!task.is_null()) << from_here.ToString();
        return incoming_queue_->AddToIncomingQueue(from_here, task, delay, true);
    }

    bool MessageLoopTaskRunner::PostNonNestableDelayedTask(
        const tracked_objects::Location& from_here,
        const base::Closure& task,
        base::TimeDelta delay)
    {
        DCHECK(!task.is_null()) << from_here.ToString();
        return incoming_queue_->AddToIncomingQueue(from_here, task, delay, false);
    }

    bool MessageLoopTaskRunner::RunsTasksOnCurrentThread() const
    {
        AutoLock lock(valid_thread_id_lock_);
        return valid_thread_id_ == PlatformThread::CurrentId();
    }

    MessageLoopTaskRunner::~MessageLoopTaskRunner()
    {
    }

} // namespace internal

} // namespace base
